Lubricator for engines



. G, H. GlLMAN.

LUBRICATOR FOR ENGINES. l APPLICATION FILED .NOV- 22. |916- RENEWD IAN. 27.1922- Patented Nov. 7

Patented Nov. 7, 1922-..

STATES PATENT FFlcl-z.

GEORGE. H. GILMAN, 0F BOSTON, MASSACHUSETTS. ASSIGNOR T0 SULLE-TAN I MACHINERY COMFANY, A CORPORATION OF MASSACHUSETTS.

LUBRICATOJR FOR ENGINES.

Original application :filed .Tune 28, 1915, Serial No. 36,623. Divided and this application filed November 22, 1916, Serial No. 132,899. Renewed January 27, 1922. Serial No. 532,257.

To all whom it may con/cern.:

Be it known that l, GEORGE H. GILMAN, a citizen of the United States, residing at Boston, in the county of Suolk and State of Massachusetts, have invented certain new and useful Improvements in Lubricators for Engines, of which the following is a full, clear, and exact specification.

My invention relates to lubricators for engines. l

It has for its object to lubricate an engine in an improved manner whereb-y the pulsations in the cylinder thereof are utilized to supply lubricant to the cylinder. A. more specific ob-ject of my invention is to provide an improved lubricating device especially adapted to rock drills wherein the pulsations in the drill cylinder act as a pump and,A

through suitable automatically acting vvalve mechanism, cause a preure to be developed in the lubricant reservoir in such a manner as to cause the lubricant to be supplied intermittently to the cylinder. These and other objects of m invention will, however, hereinafter more ully appear.

L In the accompanying drawings, I-have shown, for purposes of illustration, my invention as applied to a rock drillfo the hammer drill type wherein the piston acts.

also as ahammer intermittently engaging the drill steel, although it should be understood that my invention is not limited to use in this connection.

In these drawings,-

Fig. 1 is a partial central longitudinal sectional view of the drill'equipped with my improvement.

Fig. 2 is an enlarged central longitudinal sectional View of a portion of the lubricating mechanism.

In this application, which is a division of my copending application Serial No. 36,623, rock drill, filed June 28, 1915, I have shown a hammer drill of usual construction comprising a reciprocating piston 1 movable in a cylinder 2 and having a reduced front end 3 adapted intermittently to engage. a drill steel 4 carried in a. suitable chuck and chuck housing indicated at 5. As in a usual construction, the movement of this piston 1 is controlled by a suitable valve (i controlling a supply of pressure iuid from a suitable source 7, the pressure fluid passin alternately from the valve to opposite en s of the cylinder lthrough suitable passages 8, and thereafter being alternately exhausted from the cylinder through these passages and exhaust ports 9, all in a well known manner. As shown, a suitable rotating mechanism indicated at 10 is also supplied to impart a rotary movement to the chuck and steel as the piston moves in the cylinder. These mechanisms per se do not, however, enter into my present invention, so that a more detailed descrip-tion of the same seems unnecessary.

In my improvement, it will be noted that a cylindrical member 11 is threaded at 12 into the rear head v13 of the cylinder. A reservoir 14 maybe, if desired, disposed in the drill handle 15 as shown, and preferably communicates through an annular passage 16 with a plurality of longitudinally disposed passages 17 and 18 in the member 11. These passages 17 and 18 in turn preferably communicate with enlarged passages 19 and 20, housing in their opposite ends check valves ofv any suitable type, shown herein as balls 21 and 22 normally heldin closed position by springs 23 and 24. As illustrated, one of these balls, herein 22, is disposed normally by its spring in such a manner as to close the outlet of the passage 1.8, while the other is so disposed by its spring 23 as to close an inlet 25 in a ring 26 threaded into the end ofthe member 11. As shown, one spring 23 is disposed adjacent the forward end of the passage 17, and its fellow 24 is disposed adjacent an outlet 27 in a threaded rlng 28 lcorresponding to the ring 26. In a preferred form, the member 11 projects inwardlv from the rear head 13 'of the v cylinder, as shown, and into a suitable chamber 29 in the rear end of the piston so that a telescopic action takes place when the piston moves toward the rear end of its cylinder, thus enabling the over-all length of the machine to be reduced through eliminating the necessity for extending the rear head to the front wall of the member l1. It will be obvious,lhowever, that when desired my improved construction may be utilized in various positions relative to the piston and rear head.

In the preferred form of my invention illustrated herein, it will be noted that the' member l1 also acts as a support for an axially disposed tube 30 having one end extending into an axial perforation 31 in the drill steel 4,-and its body portion protruded through a similar perforation in the piston l, while its rear end extends into the `member 11. As shown,- this tube is provided with a laterally and preferably radially extending portion 32 clamped between an adjustable nut 33 and a suitable packing 34 carried in a suitable recess in the rear end of the member l1 lying to the inside of the annular pas sage 16. Thus, it will be noted that a supply of liquid may be carried through the piston to the hollow drill steel 4, as from a suitable source 35 through a passage 36 and the tube 30. If desired, a supply of gaseous Huid may also be conducted to the hollow drill steel 4 through the tube 30 by means of a suitable passage 37 extending between the valve mechanism 6 and y a cham-- ber 38 in the rear head 13 -which communicates with a longitudinally disposed passage 39 in a forwardly projecting plug 40 projecting axially into the member 33. Thus, it will be noted that as the air enters the tube 3() through the passage 39 and the water enters through the passage 36, an injector ac.- tionl will be produced tending to mix the air and water as they enter the tube. In a preferred forni, it will also be noted that the passage 39 opens into a suitable mixing chamber 41 into which the plug projects, and that a valve 42 is provided to prevent the backtiow of water through the passage 39, this valve preferably being normally held` closed by a spring 43 located at the rear of the plug 40 and carried on the valve stem.

In the use of my improved construction, it will be evident that one ofthe passages 17, 18 and one of the valves 21` 22. will form an intake passage opened by the pressure developed in the cylinder as the valve 6 admits pressure to one end thereof. while the other passage and valve will form a discharge passage held closed by this pressure.v In the form of my invention shownherein, the valve 21 acts as an inlet valve, while the valve 22 acts as an outlet valve. Thus, when the pressure in the rear end of the piston cylinder increases, i. e. when pressure is admitted to that end of the cylinder by the valve 6, the valve 21 will be opened in such a manner as to permit the entrance of a quantity of motive fiuid into the reservoir 14. As a result, such a pressure will be gradually built up in that reservoir as to cause the same to exceed the pressure of the spring 24. whereupon at each subsequent pulsation of the motive Huid in the cylinder, i. e. when the valve 6 exhausts the fluid from the rear end of the cylinder, the valve 22 will be momentarily forced trom it?. seat by this pressure in the reservoir in such a manner as to permit a small quantity of lubri. cant to passout of the passage 27 upon the exterior of the cylindrical member l1. From its point of discharge the lubricant dis# tributes itself in the formof an oil film along the surface of the member 11 and thence to the Walls of the cylinder bore. lThis film is picked up by the periphery of the piston -l and distributed uniformly over the entire surface of the cylinder bore, the movement of the 'piston serving to insure an adequatee supply to the entire rubbing surface of the cylinder. It will further be noted that when the piston is at the end of its return stroke there is a narrow annular passageway between the cylindrical member 11 and the inner wall of the recess 29, serving to ccnduct the pressure Huid from the end of the cylinder to the recess 29 when admission occurs. As the piston moves forward, after admission occurs, air will flow with high velocity through this annular passage to supply the rapidly increasing volume of cham# ber 29, and such oil as may be entrained by this air and deposited upon the wallsof the recess 29 will gradually flow therefrom to the outside periphery of the piston 1 whence it will be distributed to the walls of the cylinder.

By the use of my improved construction, it is evident that I am enabled to utilize the same with drills using either gaseous or liquid cleansing agents for the drill steel, the lubricating mechanism being disposed in such a manner as to inno way interfere with the connection of the tube used for cleansing the drill steel. 'It will also be noted that when desired the lubricating device may be readily removed by simply removing the mem'ber 11, and that the angular position of this member 11 in no way affects the operation of the lubricating device, t-he latter being operative in all positions of the member 11, due to the provision of the annular chamber 16. It will further be noted that since the tube 30 is supported in the member 11 the latter and the tube may both be bodily removed from the cylinder on removal of the rear head of the cylinder and that they are movable together during such removal.

f'hile I have in this application specifically described one embodiment' which my invention may assume in practice, it is to be understood that the form thereof shown herein is used for illustrative purposes only, and that the invention may be modified and embodied in various forms without departing from its spirit, it being my intention to include all such modifications within the scope of the appended claims.

`iVhat I claim as new and desire to secure by' Letters Patent is: I

1. In a lubricator. a cylinder, a ,recessed piston movable thereon, and lubricant supplying means receivable in said piston recess I A84@ @di actuated by the variations in pressure in said cylinder and delivering lubricant directly into the latter.

2. In a lubricator, a cylinder having a head, a recessed piston movable in said cylinder, and lubricant supplying means disposed in said head and receivable in said piston recess actuated by the variations in pressure in saidv cylinder.

3. In a lubricator, va cylinder having a rear head, a recessed piston movable in said cylinder, and lubricant supplying means disposed in said rear head, and receivable in said piston recess and actuated by the variations in pressure in said cylinder.

4. In a lubricator, a cylinder having a head, a piston working in said cylinder and provided with a recess in one end thereof, anda lubricator supported in said cylinder adjacent said head and projecting into said recess during a portion of the travel of said piston.

5. In a lubricator, a cylinder, a piston therein provided with a recess in one of its ends, and lubricating means actuated by the variations in pressure in said cylinder and projecting into said recess during a portion of the travel of said piston.

6. In a lubricator, a cylinder, a pist-on therein, means disposed within one end of said cylinder having substantially axially disposed lubricant supply means opening d1- rectly into said cylinder, and check valve mechanism controlling the supply of pressure to said lubricant supply means.

7. In alubricator, a cylinder, a piston movable in said-cylinder, means forming a substantially coaXially disposed lubricant suppl communicating with one endpof said cylin er, and check valve controlled means for controlling the supply of pressure to said lubricant supply and the supply of lubricant therefrom.

8. In a lubricator, a cylinder, a piston movable therein and having a recess in'one of its ends to receive a lubricant, a lubricator communicating with a source of .lubricant supply and having supply means opening into said recess,l and check valve controlled means controlling the admission of pressure lto said supply means and the supply of'lubricant therefrom.

9. In a'lubricator, a cylinder having a head, a piston movable in said cylinder, a member carried in said head having a series of passages therein opening directly into said cylinder, a source of lubricant su ply communicating with said passages, an oppositely acting check valvesdisposed in said passages.

10. Ina lubricator, a cylinder having a head, a piston movable in said cylinder, a

member carried in said head having an annular passage therein and commumcatlng forwardly disposed passages, oppositely acting check valves controlling said passages,

anda lubricant supply connected to said an-v nular passage.

11. In combination, a cylinder, a piston therein, and lubricant supplying means l0- cated within said cylinder and actuated by variations in pressure in said cylinder to supply lubricant directly thereto,

12. In combination, a cylinder, a detachable head therefor having a lubricant reservoir, and cylinder-pressure-actuated lubricant pumping means within said head.

13. In combination, a cylinder, a detachable head therefor having a lubricant reservoir, and a cylinder-pressure-operated valve control for the feed of said lubricant inclosed within said head.

11i. In combination, a cylinder, a detachable head therefor having a lubricant reservoir, said head having a reduced portion projectinginto the clearance space of said cylinder, and lubricant pumping means in said portion.

15. In a lubricator, a cylinder, a rotating piston movable axially therein, and cylinder-pressure-responsive means for supplying lubricant to said cylinder, said piston spreading said lubricant uniformly over the cylinder walls.

16. In combination, a cylinder, a lubricator projecting thereinto, and a rotating piston movable axially in said cylinder an-d having av recess to receive said lubricator when at one end of its stroke, said rotating piston distributing lubricant substantially uniformly over the walls of the cylinder.

17. In combination, a cylinder, a rotating piston, and a lubricator disposed at one end of said cylinder and actuated `by variable pressure in said c linder for discharging lubricant to said cylinder, said piston delivering the lubricant uniformly to the cylinder walls.

18. In a lubricator, acylinder, a piston movable therein, means forming a substantially coaxially disposed lubricant supplyv communicable with one end of said cylinder, check valve control means for controlling the supply of pressure to said lubricant supply and the supply of lubricant therefrom, said piston' constituting means for delivering lubricant' uniformly over the cylinder walls. y

19. In combination, a cylinder,'a rotating piston, a lubricator disposed in one end of said cylinder and actua-ted by variable pressure in said cylinder whereby lubricant 'may be supplied toY said piston, and means carr-ied by said piston for delivering lubricant to thewalls ofthe cylinder.

20. In combination, a cylinder, a rotatin piston, a lubricator disposed in one end o said cylinder and actuated by variable pressure in said cylinder whereby lubricant may be supplied to said piston, and means carand actuated by variable pressure in said cylinder whereby lubricant may be supplied to said piston, and means carried by said vpiston for delivering part of the lubricant to the walls of the cylinder.

23. In a lubricator. a cylinder, a rotating piston movable therein, means forming a substantially coaxially disposed lubricant supply in communication with one end'of said cylinder, check valve controlled means for controlling the supply of pressure to said lubricant supply and the supply of lubricant therefrom, and means carried by the piston Jfor delivering lubricant to the cylinder walls.

24. In a lubricator, a cylinder, a rotating piston movable therein, means forming a substantially coaxially disposed lubricant supply in communication with one end of said cylinder, check valve controlled means for controlling the supply of pressure to said lubricant supply and the supply of lubricant therefrom, and means carried by the piston for delivering part of thelubricant to the cylinder walls.

25. In a lubricator, a cylinder, a rotating piston movable therein, a recess carried by said piston, and a lubricator disposed substantially axially-in one end of said cylinder and actuated by variable pressure in said cylinder tor discharging a lubricant for said recess. said pistonl delivering lubricant from the recess to the walls of the cylinder.

2G. In a lubricator, a cylinder, a rotating piston movable therein, a recess carried by said piston` and a lubricatordisposed substantially axially in one end of said cylinder and actuated by variable pressure in said cylinder for discharging a lubricant for said recess. said piston delivering part of the lubricant from the recess to the walls of the cylinder.

2T. In a lubricator, a cylinder having a head, a piston movable in said cylinder, a source ot lubricant supply, a member carried in said head having passages communicating therewith and delivering lubricant directly into said cylinder, controlling` means tor said passages actuated by the variations in pressure in said cylinder, and means for delivering fiuid axially through said piston likewise carried in said member.

28. In a lubricator, a cylindery having a head, a piston movable in said cylinder, a member carried in said head and having a plurality of longitudinally "disposed passages opening directly into said cylinder andan annularly disposed passage communicat ingwith said passages, a source ot lubricant supply communicating with said annular passage, and a plurality of oppositely acting check valves disposed in said longitudinally disposedA passages and controlled by the variations in pressure in said cylinder.

29.. In a lubricating mechanism for motors comprising a cylinder having a piston reciprocable therein and suitable heads for said cylinder, a lubricant reservoir in one of said heads, passages extending in a generalv longitudinal direction with respect to said cylinder through said head and conL necting said lubricant reservoir and the bore of said cylinder, and valve means controlling said passages and operative on opposite passes of the piston in said cylinder to permit liow in opposite directions between said cylinder and said lubricant reservoir.

30. In a lubricating mechanism for a motor which comprises a cylinder, a piston in said cylinder and suitable heads for said cylinder, a lubricant reservoir in one of said heads, passage means extending in a direction longitudinally of the cylinder between said lubricant reservoir and one end of the bore of said cylinder, and valve means controlling said passage means and actuated by pressure variations occurring within said cylinder for permitting opposite flowthrough said passage means on opposite strokes of said piston.

3l. In combination, a cylinder, apiston movable in said cylinder and having a re- 10,5 cess in one of its ends, lubricating means re ceivable in said recess. Huid supply means disposed coaxially of said piston and carried by said lubricating means, and means whereby said ,last mentioned elements may be 110 bodily removed from said cylinder.

32. In combination, a cylinder having a head, a piston movable in said cylinder and having a recess in one of its ends, a lubricator receivable in said recess and removablyv connected to said head, and fluid supply means disposed coaxially with said piston and operatively connected to said lubricator and bodily movable therewith.

33. In a lubricator, a lubricator casing having passages only in its opposite ends and connected thereby to a source of lubricant and to a variable pressure space respec'tively. a reeiprocatory valvey member carried in said lubricator casing and movable to close one of said passages, and means whereby lubricant is delivered to said passages upon opening of the same.

34. In a lubricator, a lubricator casing having passages only in its opposite ends and connected-thereb to a. source of 1ubricant and to a varia le pressure space respectively, and a reciprocatory gvalve member in said casing andmovable to lose one 5 of said passages. v

35. In a lubricator, a lubricator casing having passages only in its opposite endsv and connected thereby to a' souroe of lubricant and to a variable pressure space yrespectively, and a reciprocatory valve member alternately opening and closing one of said passages and located in said casing.

In testimony whereof I ax m signature.

GEORGE 'H. vCIILlSiANv 

